transmission: Fix compilation under uClibc-ng

Upstream has a patch for this dated 2016.

Also ran the init script through shellcheck.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
(cherry-picked from f4f665c7db)

net/transmission/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=transmission
 PKG_VERSION:=2.94
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=@GITHUB/transmission/transmission-releases/master
@@ -134,14 +134,12 @@ CONFIGURE_ARGS += \
 	--without-systemd-daemon
 
 ifeq ($(BUILD_VARIANT),mbedtls)
-  CONFIGURE_ARGS += \
-	--with-crypto=polarssl
+  CONFIGURE_ARGS += --with-crypto=polarssl
   CONFIGURE_VARS += \
 	MBEDTLS_CFLAGS="-I$(STAGING_DIR)/usr/include/mbedtls" \
 	MBEDTLS_LIBS="-lmbedtls -lmbedcrypto"
 else
-  CONFIGURE_ARGS += \
-	--with-crypto=openssl
+  CONFIGURE_ARGS += --with-crypto=openssl
 endif
 
 define Package/transmission-daemon-openssl/install